package top.majuan.study.study.servlet.employee;

import top.majuan.study.study.dao.TbEmployeeDAO;
import top.majuan.study.study.entity.Result;
import top.majuan.study.study.entity.TbEmployee;
import top.majuan.study.study.util.JsonUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

@WebServlet(name = "employeequerybyid", urlPatterns = "/employee/querybyid.action")
public class QueryByIdServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        text/plain
        resp.setContentType("application/json");
        PrintWriter writer = resp.getWriter();

        try {
            Integer id = Integer.parseInt(req.getParameter("id"));
            TbEmployee employee = TbEmployeeDAO.queryById(id);
            if (employee==null) {
                Result<String> result = Result.fail("未查询到数据", null);
                writer.println(JsonUtils.stringify(result));
            } else {
                Result<TbEmployee> result = Result.success("", employee);
                writer.println(JsonUtils.stringify(result));
            }
        } catch (Exception e) {
            e.printStackTrace();
            Result<String> result = Result.fail("主键查询发生错误", null);
            writer.println(JsonUtils.stringify(result));
        }

    }
}
